Appendix D - Geotechnical Report

   Text Figure 8: View of concrete water tanks to east of house (LHS) & spearated apron slab (RHS)

The back garden behind the residence (to the north) generally dipped down at about 14°.

5.1.4        Proposed Lot 4
The building area for proposed Lot 4 dips down from Black Mountain Range Road at about 15° to 16°.
The slope continues away from the building envelope at up to 18°, before flattening slightly at the
confluence of two drainage lines to about 13°. The remainder of the block to the north consists mostly of
a broader scale convergent landform, which includes a dam.
The proposed building area is located on a broad, consistently defined and relatively linear slope
between the two spurs on the adjacent lots to the east (Lot 5) and west (Lot 3).
This type of feature would tend to promote sheet flow, and indeed there was little sign of channelised
erosion around the gully inverts downslope. Some minor exposed soils (described as pale brown silty
clay) was observed in the lower flanks, however this was assessed to be caused mostly by livestock action
across the slope. Some medium size trees were present, clustered around the gully inverts and the dam
downslope.
                                                                                      Spurs on proposed Lots
                                                                                      3 and 5




                                                                                                 Linear slope forming
                                                                                                 building area for
                                                                                                 proposed Lot 4

             Text Figure 9: Site layout (courtesy MWA) and oblique aerial view looking south




Geotechnical Investigation
10 June 2026 | 26073-001-Rev0                                                                                  9